body {
    font-family: Arial, sans-serif;
    background-color: #f8f9fa;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    max-width: 600px;
    width: 100%;
    padding: 20px;
    background-color: #ffffff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    text-align: center;
}

.display-4 {
    color: #343a40;
}

.form-group {
    margin-bottom: 15px;
}

    .form-group label {
        display: block;
        margin-bottom: 5px;
        font-weight: bold;
        color: #495057;
    }

.form-control {
    width: 100%;
    padding: 10px;
    font-size: 16px;
    line-height: 1.5;
    color: #495057;
    background-color: #ffffff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: 4px;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

    .form-control:focus {
        border-color: #80bdff;
        outline: 0;
        box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
    }

.btn-primary {
    display: inline-block;
    font-weight: 400;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 0.25rem;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
}

    .btn-primary:hover {
        color: #fff;
        background-color: #0069d9;
        border-color: #0062cc;
    }

.mt-3 {
    margin-top: 1rem !important;
}

.pb-3 {
    padding-bottom: 1rem !important;
}

.text-center {
    text-align: center !important;
}

a {
    color: #007bff;
    text-decoration: none;
}

    a:hover {
        color: #0056b3;
        text-decoration: underline;
    }
